Injuries have hampered Sharapova's game recently, but she maintains the most valuable endorsement roster of any female athlete, worth $22 million annually. Partners include Canon, Prince, Tiffany, Tag Heuer and Land Rover. Her biggest deal is with Nike, which re-signed Sharapova in January to an eight-year contract worth up to $70 million. She will receive royalties from her own tennis line and a line of bags and shoes through Nike subsidiary Cole Haan.

Photo: AP Photo/Shuji KajiyamaEarnings estimates are for June 1, 2009 to June 1, 2010. Includes dollars earned solely from entertainment income. Management, agent and attorney fees have not been deducted. Figures rounded off where appropriate. Sources include Billboard, Pollstar, Adams Media Research, The Nielsen Company and SNL Kagan. Rankings are generated by combining earnings with other metrics: Web hits on Google Blog Search, TV/radio mentions on LexisNexis, overall press mentions on Factiva and the number of times a celebrity's image appeared on the cover of 25 consumer magazines. Social rank is calculated using such metrics as Facebook friends and fans as well as Twitter followers.